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Security Bulletin: Security vulnerabilities found in the Red Hat Universal Minimal Base Image shipped with CICS Transaction Gateway for Multiplatforms

Security Bulletin


Summary

Security vulnerabilities found in the Red Hat Universal Base Image Minimal shipped with CICS Transaction Gateway for Multiplatforms. This fix resolves these vulnerability (CVE-2024-28757, CVE-2025-59375, CVE-2025-5372).

Vulnerability Details

CVEID:   CVE-2024-28757
DESCRIPTION:   libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).
CWE:   CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
CVSS Source:   NVD
CVSS Base score:   7.5
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:   CVE-2025-59375
DESCRIPTION:   libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
CWE:   CWE-770: Allocation of Resources Without Limits or Throttling
CVSS Source:   cve@mitre.org
CVSS Base score:   7.5
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:   CVE-2025-5372
DESCRIPTION:   A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions' confidentiality, integrity, and availability.
CWE:   CWE-682: Incorrect Calculation
CVSS Source:   NVD
CVSS Base score:   8.8
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
IBM CICS Transaction Gateway for Multiplatforms9.3
IBM CICS Transaction Gateway for Multiplatforms10.1

Remediation/Fixes

IBM strongly recommends addressing the vulnerabilities now by updating CICS Transaction Gateway for Multiplatforms.

ProductVRMFRemediation / First Fix
CICS Transaction Gateway for Multiplatforms9.3

iLinux Link

zLinux Link

CICS Transaction Gateway for Multiplatforms10.1

iLinux Link

zLinux Link

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

Change History

26 Jan 2026: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location

Worldwide

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Document Information

Modified date:
26 January 2026

Initial Publish date:
26 January 2026

UID

ibm17257918